Falls



G. w. CHAPMAN, 1r.

Harvester Cutter. Y No. 80,598. r v .Patented Aug 4, 1868.

ahy/2m V-gg @gleiten tets @stent @ffies e. w. CHAPMAN, gm., or townL FALLS, town, AssieNonTo HIMSELF AND w. A.V PLANTZ, or SAME ritten.

Letten Patent No. 80,598, dated `August r4, 186s.

IMPROVEMENT In HARVESTER-corrette.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, G.' W. CHAPMAN, Jr., oi` Iowa, Fells, in the county of Hardin, und State of' Iowa, have 'invented a new and useful Improvement in Sickle-Bars for Mowing-Machines; and I do hereby ,declare that theA following is a full, clear, and e'xact description thereof, which will enablethose skilled in the art to make und use the same, reference being had to the accompanying drawings, forming part of this specification, in which- A A Y Figure l is n top view of my improved sickle-ber.

Figure 2 is a. vertical longitudinal section, taken in the line x x, 13g.` 1.

Figure 3 isn cross-section through y y, iig. 1.

' Similar letters of reference indicate corresponding parts.

This invention relates to an improvement in: the construction of sickle-bars for mowers and renpers, and consists in forming the bor in two pieces, in such manner as tosecure separate cutters or teeth between them, so that the teeth may be easily removed when necessary to sharpen and .repair them, or replace any when broken, as hereinafter described.

The teeth, a a, are made separately,with cutting-points and sides formed inthe .usual manner, but having ther backs mede with u rib or'shoulder, e, as shown in iig. 3, which fits in a. recess formed between two bars, b'

b', to hold the teeth in place firmly.

"On one end of the lower bar b is an upset or shoulder, d, through which shoulder a. screw, e,held by the head, passes into the end of the upper bar b to draw it up, and thustighten the bars upon the teeth.Y

This is accomplished by means of screws h h, which pass through slots s s, in the upper ber b', at points i between the separate teeth, alternately', in polirs or otherwise, and screwed into the lower bnr b.

The head of the screws isjmade broadrand flat-shouldered on the under side, to lap over and lie upon the side of the slotthrough which the Shank passes, or tits in a, recess wider than the slot, which recess has an inclined bottom, :tsV seen in dg. 2, `whereby the two hars b b are drown together tightly upon the back of the teeth by the pressure of the heads of the Screws t h, when the upper bar b is moved by the end screw e, which operation nud effect will be readily, perceived. v

Having described myinvention, I claim as'new', and' desire to secure by Letters Patent- The sickle-bar, constructed as described, consisting of the upper-bar b', provided with the inclined slots .9, for the passage of the screws h, the lower `bar b having a. groove for the reception of the ribs c of the teeth a,

`said bars being adjusted to clamp the teeth by means of the screw e in their upset ends, as herein described for the purpose specified.

G. W. CHAPMAN, JR.

Witnesses:

O. W. GAnRIsoN, P. MARTIN. 

